Nec Corporation

Mitsubishi Electric Corporation

Kawasaki Jukogyo Kabushiki Kaisha

Yoshiaki Wakabayashi

Yasuhiro Shirakawa

Yuji Kakuta

Yoshiaki Fukasawa

Hiroshi Toyao

Hirokazu Tohya

Kenji Yamada

Satoko Itaya

Shinichi Doi

Akiji Higuchi

Kouichi Yamaguchi

Hajime Ishikawa

Risato Ohhira

Soichiro Bando

Hisanosuke Kawada

Yuji Katsuyama

Hideaki Ezaki

Isao Suzumura

Koyo Uemura

Satoru Oga

Junich Miyamoto

A railcar control apparatus comprises a synchronous slide/slip detector which determines that the axles are synchronously sliding/slipping if an absolute value of axle's speed difference is less than a synchronous slide/slip speed difference threshold and an absolute value of axle's acceleration is greater than a predetermined synchronous slide/slip acceleration threshold.

Apparatus for controlling railcar and methods for detecting synchronous slide/slip

In order to allow the broader selection of modules that configure a vehicle, this information processing system, which is for checking a vehicle configured by combining a plurality of vehicle modules, is characterized by being provided with: a first judgment means that judges whether or not each vehicle module has been certified; a second judgment means that judges whether or not the combination of the plurality of vehicle modules can be certified; and a determination means that determines the conditions necessary for the combination of the plurality of vehicle modules to receive certification.

Information processing system, method for checking vehicle, and program  for checking vehicle

A waveguide includes: a first tubular waveguide path that transmits electromagnetic waves having a predetermined wavelength; and a stub that is formed such that a depth thereof becomes a quarter of the predetermined wavelength, an open end of the stub making internal contact with a contour line, and the contour line being spaced apart from an inner wall part of one end of the first tubular waveguide path in a radially outward direction by only a quarter of the predetermined wavelength.

Waveguide, waveguide connection structure and waveguide connection method

Provided is a semiconductor device including a wiring board having a first surface on which a board-side ground terminal and a board-side power supply terminal are provided; a semiconductor chip arranged so as to face the first surface of the wiring board, where the first surface faces an opposite surface of the semiconductor chip; a shield layer provided at the semiconductor chip so as to cover an outer surface of the semiconductor chip except for the opposite surface; a chip-side power supply terminal which is provided on the opposite surface and is electrically connected to the board-side power supply terminal; a chip-side ground terminal which is provided on the opposite surface and is electrically connected to the board-side ground terminal and the shield layer; and a first capacitively coupled part by which the shield layer and the chip-side power supply terminal are capacitively coupled with each other.

Semiconductor device having shield layer and chip-side power supply terminal capacitively coupled therein

A microstrip line element is composed of a first electrode layer () as a substrate which is more of a metal, a dielectric layer () formed by oxidizing, nitriding or oxiynitriding the first electrode layer (), a conductor layer () formed on the dielectric layer () and a second electrode layer () formed on the conductor layer (). The conductor layer () is composed of at least conductive nanoparticles () and a binder resin ().

Nanoparticle transmission line element and method of fabricating the same

An input transformer, used as a transmission-line transformer (11), is provided for connection between an unbalanced transmission line (10) and a balanced broadband amplifier (12), in which the input transformer has a fixed middle potential. The transmission-line transformer (11) converts an input signal into two output signals having opposite phase with respect to each other and which are supplied to the broadband amplifier (12). It is therefore possible to cancel secondary distortion in an amplifying unit. As the transmission-line transformer (11) a forced-balun type transmission-line transformer is used which has two input ports (P1, P2) and three output ports (P3, P4, P5), one (P4) of which is grounded. First and second two-wire parallel lines are arranged between the input ports and the output ports via a single glasses-shaped core. The input port and the two output ports have a respective impedance ratio of 1:(1/2):(1/2).

Amplifying unit comprising an input transformer capable of contributing

A plurality of field effect transistors (FET's) (11, 12) are coupled in cascode connection. A drain of the final-stage FET (12) is coupled to a gate of the first-stage FET (11) through a first negative-feedback circuit (13). A drain of the first-stage FET (11) is coupled to the gate of the first-stage FET (11) through a second negative-feedback circuit (14). The first negative-feedback circuit (13) is connected to a first resistor (Rf1) while the second negative-feedback circuit (14) is connected to a second resistor (Rf2).

Negative-feedback amplifier circuit capable of independently controlling

Growing community of inventors

Tokyo, Japan

Yoshiaki Wakabayashi